Magnetic levitation science education device for demonstrating rendezvous and docking of spacecrafts

Abstract

The invention belongs to the technical field of teaching demonstration devices, and discloses a magnetic levitation science education device for demonstrating rendezvous and docking of spacecrafts. The device includes two motors enabling two tracks having different lengths to make circular motions around the center of a circle through transmission gears; electric push rods, installed on the tops of the motors, wherein each electric rod is connected to one of the motors through a transmission gear; and a magnetic levitation device used for adjusting the revolution speed and direction of the motors, wherein the magnetic levitation device is connected to the motors by conductors. Based on a dynamics model, a control mathematical space of relative postures and positions of rendezvousing spacecrafts is constructed and a proportional differential control parameter design method is applied to control of relative positions. The magnetic levitation science education device for demonstrating rendezvous and docking of spacecrafts uses the magnetic levitation technology, the lever principle, the transmission principle and so on, and the theoretical knowledge of spacecraft rendezvous and docking is studied in depth during production. A carefully selected docking presentation mode well reflects the postures and trajectories of rendezvous and docking of spacecrafts.

Description

technical field [0001] The invention belongs to the technical field of teaching and demonstration devices, in particular to a scientific and educational device for magnetic levitation demonstration spacecraft rendezvous and docking. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] In my country's "three-step" development strategy for manned spaceflight, the key technology of the second step is to break through the rendezvous and docking of space vehicles. The Shenzhou spacecraft and the Tiangong target aircraft have completed multiple rendezvous and docking missions, including automatic docking and manual docking. Under the precise control of scientific and technical personnel, the Shenzhou spacecraft has undergone multiple orbit changes, and gradually approached the Tiangong target aircraft by means of autonomous guidance and control, and finally completed the docking task. [0004] Maglev technolog...

AI Technical Summary

Problems solved by technology

[0007] (1) Since the rendezvous and docking of spacecraft involves the movement of two high-speed aircraft in space and eventually becomes a combined movement, the existing technology cannot form a combined body in this case

The difficulty lies in the fact that it is very difficult to simulate a spacecraft flying around the earth in space; the greater difficulty lies in that the rendezvous and docking of a spacecraft involves the relative motion of two spacecraft, both of which are in circular motion. It is very difficult to find out the docking posture and position at the same time

[0008] (2) Conventional maglev objects move in one linear dimension or on one plane, which cannot reflect the spatial relationship in real space; therefore, it is necessary to design relevant transmission devices to realize the movement of the attitude and position of the two spacecraft in space

[0009] (3) Demonstrate that the rendezvous and docking process of the spacecraft is uncontrollable. If no control is applied, if the relative motion of the two spacecraft is too slow, the distance between the two spacecraft will become farther and farther; if the relative motion is too fast, there is a danger of collision; The movement speed is suitable, but the relative attitude is not suitable, and the docking cannot be successfully achieved after completing the rendezvous phase

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